Add codecs to librbcodec.

Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>

lib/rbcodec/codecs/lib/libcodec.make

@@ -0,0 +1,37 @@
+#             __________               __   ___.
+#   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+#   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+#   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+#   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+#                     \/            \/     \/    \/            \/
+# $Id$
+#
+
+CODECLIB := $(CODECDIR)/libcodec.a
+CODECLIB_SRC := $(call preprocess, $(RBCODECLIB_DIR)/codecs/lib/SOURCES)
+CODECLIB_OBJ := $(call c2obj, $(CODECLIB_SRC))
+OTHER_SRC += $(CODECLIB_SRC)
+
+$(CODECLIB): $(CODECLIB_OBJ)
+	$(SILENT)$(shell rm -f $@)
+	$(call PRINTS,AR $(@F))$(AR) rcs $@ $^ >/dev/null
+
+CODECLIBFLAGS = $(filter-out -O%,$(CODECFLAGS))
+
+ifeq ($(MEMORYSIZE),2)
+    CODECLIBFLAGS += -Os
+else ifeq ($(ARCH),arch_m68k)
+    CODECLIBFLAGS += -O2
+else
+    CODECLIBFLAGS += -O1
+endif
+
+# Do not use '-ffunction-sections' when compiling sdl-sim
+ifneq ($(findstring sdl-sim, $(APP_TYPE)), sdl-sim)
+    CODECLIBFLAGS += -ffunction-sections
+endif
+
+$(CODECDIR)/lib/%.o: $(RBCODECLIB_DIR)/codecs/lib/%.c
+	$(SILENT)mkdir -p $(dir $@)
+	$(call PRINTS,CC $(subst $(ROOTDIR)/,,$<))$(CC) \
+		-I$(dir $<) $(CODECLIBFLAGS) -c $< -o $@